JP2024027390A - Fuse unit and fuse unit assembly method - Google Patents

Abstract

An object of the present invention is to provide a fuse unit and a method for assembling the fuse unit that are downsized in the vertical direction. SOLUTION: A fuse unit 1 includes a first unit 2 connected to a battery 100, a second unit 2C connected to a load, and a connecting part 9 connecting the first unit 2 and the second unit 2C. , the first unit 2 includes a first housing 20, a first connecting portion 31 connected to the battery 100, and a fusing portion 51, and the second unit 2C includes a second housing 20. 8 and has a second connection part 71 connected to the load, and the connection part 9 is provided continuously between the fusing part 51 and the second connection part 71, and The connecting portion 9 is formed by exposing a metal plate to the outside, and the connecting portion 9 is bent so that the first unit 2 and the second unit 2C face each other. [Selection diagram] Figure 10

Description

The present invention relates to a fuse unit and a fuse unit assembly method.

Conventionally, a fuse block has been proposed that is connected to a battery post to distribute power from the battery to each load, and breaks the circuit when an overcurrent flows (for example, see Patent Document 1) ).

The fuse block disclosed in Patent Document 1 includes a fuse element having a configuration in which a plurality of circuit connection terminals made of a metal plate are connected to the tip of a bus bar made of a metal plate via a circuit protector, and this fuse element is connected to an L. The fuse housing is configured to include a resin fuse housing that is housed and held in a letter shape, and a cover that is attached to the fuse housing so that it can be opened and closed.

The bus bar includes a battery connection plate that extends along the top surface of the battery, and a plurality of protector connection plate portions that extend from the battery connection plate and connect the battery connection plate and each circuit protector. Be prepared. Each circuit protector and each circuit connection terminal are provided along the side surface of the battery, and are provided continuously in a direction away from the top surface of the battery (vertical direction).

Japanese Patent Application Publication No. 2010-61813

However, conventional fuse blocks are limited in the space in which each circuit protector (fused part) and each circuit connection terminal (second connection part) are continuous (in the vertical direction), and there is a need for vertical miniaturization. Ta.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fuse unit that is vertically compact and a method for assembling the fuse unit.

In order to solve the problem and achieve the object, the invention as set forth in claim 1 provides a fuse unit that is supported by a battery and supplies power from the battery to a load, the fuse unit being connected to the battery. a second unit connected to the load; and a connecting portion connecting the first unit and the second unit, the first unit comprising a first housing and connected to the battery. The second unit includes a first connecting portion that is connected to the load, and a fusing portion that fuses when an overcurrent flows, and the second unit includes a second housing and a second connecting portion that is connected to the load. The connecting portion is provided continuously between the fusing portion and the second connecting portion, and the metal plate is exposed to the outside. The fuse unit is characterized in that the connecting portion is bent so that the first unit and the second unit face each other.

According to the invention described in claim 1, it is possible to achieve downsizing in the vertical direction.

1 is a perspective view showing a fuse unit according to an embodiment of the present invention, and a perspective view showing a state in which the fuse unit is attached to a battery. FIG. FIG. 2 is a side view of FIG. 1; FIG. 2 is a diagram of FIG. 1 seen from the rear. 4 is a sectional view taken along line II in FIG. 3. FIG. FIG. 3 is a perspective view showing a cover that constitutes the fuse unit. It is a perspective view of the cover seen from another angle. It is a figure for explaining the assembly procedure of assembling the said fuse unit, and is a perspective view which shows the state before bending the connection part which comprises the said fuse unit. FIG. 8 is a perspective view showing a post-process in FIG. 7; FIG. 9 is a perspective view showing a post-process in FIG. 8 . FIG. 9 is a perspective view showing a post-process in FIG. 9; FIG. 10 is a perspective view showing a post-process of FIG. 10, and is a perspective view showing a state in which the fuse unit is attached to a battery.

An embodiment of the present invention will be described below based on FIGS. 1 to 11. FIG. 1 is a perspective view showing a fuse unit 1 according to an embodiment of the present invention, and is a perspective view showing a state in which the fuse unit 1 is attached to a battery 100. FIG. 2 is a diagram of FIG. 1 viewed from the side (left-right direction Y). FIG. 3 is a diagram of FIG. 1 viewed from rear X2. FIG. 4 is a cross-sectional view taken along line II in FIG. 3. FIG. 5 is a perspective view showing the cover 10 constituting the fuse unit 1. As shown in FIG. FIG. 6 is a perspective view of the cover 10 seen from another angle.

As shown in FIGS. 1 and 2, a fuse unit 1 according to an embodiment of the present invention is directly attached to a battery 100, and supplies power from the battery 100 to each load (not shown). As shown in FIG. 1, the battery 100 includes a box-shaped battery main body 101 and a pair of battery posts 102 and 103 that protrude upward Z1 from the battery main body 101. As also shown in FIG. 2, fuse unit 1 is attached to battery 100 using battery terminals 104 and stud bolts 105.

As shown in FIGS. 1 to 4, the fuse unit 1 includes a unit main body 2 as a first unit in the claims, which is formed in an L shape, a unit lower part 2C as a second unit in the claims, and a unit main body 2. The unit includes a fourth bus bar 9 (shown in FIG. 4) as a connecting portion in the claims for connecting the unit lower part 2C and a cover 10. As shown in FIG. 4, in this fuse unit 1, the fourth bus bar 9 is bent into a U-shape (180 degrees), so that a vertical component 2B (described later) of the unit main body 2 and a lower unit 2C face each other. They are fixed to the battery 100 in the facing state.

In this embodiment, the direction in which the battery posts 102 and 103 protrude is referred to as an up-down direction Z, the direction in which the pair of battery posts 102 and 103 are lined up is referred to as a left-right direction Y, and the direction perpendicular to the up-down direction Z and the left-right direction Y is referred to as a left-right direction Y. It may be written as the front-back direction X. The side of the horizontal component 2A viewed from the vertical component 2B of the unit body 2 is sometimes referred to as the "front (X1 direction)", and the opposite direction is sometimes referred to as the "rear (X2 direction)".

As shown in FIGS. 1 and 2, the unit body 2 is formed into an L-shape and includes a horizontal component 2A along the top surface of the battery body 101 and a vertical component 2B along the side surface of the battery body 101. There is. A first covering portion 4, which will be described later, of the horizontal component 2A and a second covering portion 6, which will be described later, of the vertical component 2B constitute a first housing 20.

As shown in FIGS. 1 and 7, the horizontal component 2A includes a first bus bar 3 made of a conductive metal plate and a first covering section 4 that covers the first bus bar 3.

As shown in FIGS. 1 and 7, the first bus bar 3 includes a first bus bar main body (not shown) covered with a first covering main body 40 of a first covering section 4, which will be described later, and a front X1 of the first bus bar main body. A battery connection part 31 as a first connection part in the claims provided in , and a power supply connection part 32 provided at the end of the battery connection part 31 in the rear X2 and the left-right direction Y.

As shown in FIG. 7, the battery connection part 31 is formed from a part of the first bus bar 3 and is formed in an annular shape having a first hole 3a. This battery connection part 31 is configured to be exposed in the vertical direction Z by a first exposed part 41 of the first covering part 4, which will be described later.

As shown in FIG. 7, the power supply connection part 32 includes a second contact part 33 formed from a part of the first bus bar 3 and formed in an annular shape having a second hole part 3b; The connecting bolt 34 is inserted into the second hole 3b of the portion 33. This power supply connection part 32 is configured to be exposed upward Z1 by a second exposed part 42 of the first covering part 4, which will be described later. Moreover, the power supply connection part 32 is connected to the power supply wire harness 15 described later using a nut N with a washer.

As shown in FIGS. 1 and 3, the power supply wire harness 15 includes a first electric wire 15A connected to a power supply section (not shown), and an electrically and mechanically connected terminal portion of the first electric wire 15A by crimping. The first terminal portion 15B is connected to the first terminal portion 15B, and the L-shaped terminal 15C is continuous to the first terminal portion 15B and connected to the power supply connection portion 32.

As shown in FIG. 7, the first covering part 4 includes a first covering main body 40 that covers the first bus bar main body of the first bus bar 3, and a battery connecting part 31 provided at the front X1 of the first covering main body 40. A second exposed part 42 is provided at the end of the first exposed part 41 in the rearward X2 and left-right direction Y and exposes the power supply connection part 32.

As shown in FIGS. 3 and 4, the vertical component 2B includes a second bus bar 5 (shown in FIG. 4) that is continuous with the first bus bar 3 of the horizontal component 2A, and a first covering portion 4 of the horizontal component 2A. A second covering portion 6 that continuously covers the second bus bar 5 is provided.

As shown in FIGS. 4 and 7, the second bus bar 5 is connected to a second bus bar body (not shown) that is continuous to the first bus bar body of the first bus bar 3, and is fused to cut off the circuit when an overcurrent flows. The fuse 51 is provided as a fusing part in four (plural) claims. As shown in FIG. 7, the four fuses 51 are provided side by side in the left-right direction Y at the end of the second bus bar 5 on the lower Z2 side.

As shown in FIG. 7, each fuse 51 includes a pair of plate-like parts 52 and 53, and a narrow part 54 that is located between the pair of plate-like parts 52 and 53 and narrower than each of the plate-like parts 52 and 53. , a fuse element 55, and is configured to melt and cut off the circuit when an overcurrent flows. As shown in FIGS. 4 and 7, each fuse 51 is accommodated in each fuse accommodating portion 61 of the second covering portion 6, which will be described later.

As shown in FIGS. 4 and 7, the second covering section 6 includes a flat second covering main body 60 (shown in FIG. 7) that covers the second bus bar main body of the second bus bar 5, and a second covering main body 60 (shown in FIG. 7). four fuse accommodating portions 61 provided in the lower part Z2 and accommodating each fuse 51; a lock protrusion 62 (shown in FIG. 7) as a first lock in the claims that engages with a unit lower part 2C to be described later; Equipped with.

As shown in FIGS. 4 and 7, each fuse accommodating portion 61 has a circumferential surface 6A that surrounds the four sides of each fuse 51 in the vertical direction Z and the horizontal direction Y, and exposes both sides of each fuse 51 in the front-rear direction X. It is configured to open in the front-rear direction X as shown in FIG. Hereinafter, as shown in FIG. 4, the opening at the front X1 of each fuse accommodating portion 61 may be referred to as an opening 6F, and the opening at the rear X2 may be referred to as an opening 6B.

Further, the second covering portion 6 is provided with a locking receiving portion (not shown) that is locked with a locking portion 12 of the cover 10, which will be described later. By locking the locking portion 12 of the cover 10, which will be described later, to the locking receiving portion, the rear openings 6B of the four fuse accommodating portions 61 at the rear X2 are collectively covered by the cover 10, which will be described later. There is.

As shown in FIG. 7, the lock protrusion 62 is provided to protrude from the side surface of the second cover main body 60 in the left-right direction Y, and is configured to engage with a lock portion 82 of the lower unit portion 2C, which will be described later. By engaging the lock portion 82 and the lock protrusion 62, the facing state in which the unit lower portion 2C and the vertical component 2B of the unit main body 2 are opposed is maintained.

As shown in FIG. 4, the unit lower part 2C serves as a third bus bar 7 connected to the second bus bar 5 via a fourth bus bar 9, which will be described later, and a second housing that covers the third bus bar 7. A third covering part 8 is provided.

As shown in FIGS. 4 and 8, the third bus bar 7 includes four (plural) continuous bus bars 70 (shown in FIG. 4) that are continuous to each fourth bus bar 9 (described later), and an external circuit wire harness 16 (described later). Four (plural) electric wire connection parts 71 (shown in FIG. 8) are provided as second connection parts in the claims, which are connected to each load (not shown) using a wire connection part 71 (shown in FIG. 8).

The continuous bus bars 70 are arranged in parallel in the left-right direction Y and spaced apart from each other. Each wire connection portion 71 is provided continuously to each continuous bus bar 70 . That is, as shown in FIG. 8, the electric wire connecting portions 71 are arranged in parallel and spaced apart from each other in the left-right direction Y. Further, each wire connection portion 71 is provided to each fuse 51 of the second bus bar 5 via each fourth bus bar 9 and each continuous bus bar 70, which will be described later.

As shown in FIG. 8, each wire connecting portion 71 is inserted into a third contact portion (not shown) formed in an annular shape having a third hole (not shown), and a third hole of the third contact portion. and a connecting bolt 73. Each wire connection portion 71 is configured to be exposed by a third exposed portion (not shown) of the third covering portion 8, which will be described later. Further, each electric wire connection portion 71 is connected to an external circuit wire harness 16, which will be described later, using a nut N with a washer.

As shown in FIG. 8, the external circuit wire harness 16 is electrically and mechanically connected to a second electric wire 16A connected to each load (not shown) and an end portion of the second electric wire 16A by crimping. The second terminal portion 16B is continuous with the second terminal portion 16B and the round terminal 16C is connected to the wire connection portion 71.

As shown in FIGS. 4, 7, and 8, the third covering portion 8 includes a flat third covering main body 80 that covers four continuous bus bars 70 (shown in FIG. 4) of the third bus bar 7, and 3. An arch-shaped peripheral wall part 81 (shown in FIG. 8) that is provided on the covering body 80 and surrounds each wire connection part 71, and an arch-shaped peripheral wall part 81 (shown in FIG. 8) that is provided on the inside of the peripheral wall part 81 and exposes each wire connection part 71. and a lock portion 82 (shown in FIGS. 7 and 8) as a second lock in the claims that engages with a lock protrusion 62 provided on the vertical component 2B of the unit main body 2.

As shown in FIG. 7, the third covering body 80 is formed into a rectangular shape in plan view, and is formed to have approximately the same size as the front surface X1 of the second covering portion 6. As shown in FIG. That is, the third covering main body 80 is configured to be able to collectively cover the opening 6F of the front X1 of each fuse accommodating portion 61 with the third covering main body 80 in the opposed state.

As shown in FIG. 8, each peripheral wall portion 81 is provided in a facing state and protrudes forward X1, and includes an arcuate surface 8A, and an inner surface 8B that continues from the arcuate surface 8A and faces in the left-right direction Y. 8B, and are configured to face each other and open to the front X1 and the downward Z2.

As shown in FIG. 8, the lock portion 82 is provided to protrude in a U-shape from the side surface of the third covering main body 80 in the left-right direction Y toward the vertical component 2B of the unit main body 2. Each lock portion 82 is configured to engage with the lock protrusion 62 by positioning the lock protrusion 62 of the vertical component 2B inside. Furthermore, the locking portion 82 and the locking protrusion 62 are engaged with each other, so that the vertical component 2B of the unit body 2 and the unit lower portion 2C are maintained in a facing state.

As shown in FIG. 7, the fourth bus bars 9 are provided in a plate shape, and are arranged in parallel and spaced apart from each other in the left-right direction Y. Moreover, each fourth bus bar 9 is provided continuously between each fuse 51 and each continuous bus bar 70, as shown in FIG. Note that, in FIG. 4, hatching showing the cross section of the fuse accommodating portion 61 and the third covering body 80 of the third covering portion 8 is omitted.

As shown in FIG. 4, each fourth bus bar 9 includes a first continuous portion 9A continuous to each fuse 51, a second continuous portion 9B continuous to the first continuous portion 9A, and a second continuous portion 9B. The third continuous portion 9C is provided between and continuous with each continuous bus bar 70 of the third bus bar 7, and is configured to be bent in a U-shape. Moreover, as shown in FIG. 7, each fourth bus bar 9 is located between the second covering part 6 and the third covering part 8, and is configured to be exposed to the outside. Further, as shown in FIG. 10, insulation protection walls 13 of a cover 10, which will be described later, are positioned on both sides of each fourth bus bar 9 in the left-right direction Y, so that adjacent fourth bus bars 9 are insulated from each other. It looks like this.

The cover 10 is made of, for example, insulating resin. As shown in FIGS. 5 and 6, this cover 10 includes a cover main body 11 formed in a rectangular plate shape, and a pair of cover main bodies 11 that are provided on the cover main body 11 and that are locked in locking receivers of a vertical component 2B. It includes locking parts 12, 12, five (plural) insulation protection walls 13 protruding from the cover main body 11, and reinforcing ribs 14 for reinforcing the insulation protection walls 13.

As shown in FIGS. 5 and 6, the cover main body 11 includes a rectangular plate-shaped fuse cover 11A that collectively covers the four fuse accommodating portions 61, and a rectangular plate-shaped fuse cover 11A that extends downward from the fuse cover 11A in a downward direction Z2. A rectangular plate-shaped bus bar cover 11B that covers the four bus bars 9 all at once is provided.

The fuse cover 11A is made of a transparent resin through which each fuse 51 can be seen, so that the state of each fuse 51 can be visually checked.

The pair of locking portions 12, 12 are provided at both ends of the fuse cover 11A in the left-right direction Y, as shown in FIGS. 5 and 6. Each locking portion 12 is formed in a U-shape, and the locking receiving portion of the second covering portion 6 is positioned on the inside thereof, so that the locking portion 12 is configured to be locked to the locking receiving portion.

As shown in FIGS. 5 and 6, each insulation protection wall 13 is formed in a plate shape and is configured to face each other in the left-right direction Y. Of the five insulation protection walls 13, two insulation protection walls 13 (denoted as 13A in FIGS. 5 and 6) protrude from both ends of the bus bar cover 11B in the left-right direction Y and are attached to both ends of the four fourth bus bars 9. The three insulation protection walls 13 (denoted as 13B in FIG. 6) are positioned so as to enter between each adjacent fourth bus bar 9.

As shown in FIG. 6, the reinforcing ribs 14 are provided extending in a plate shape from the lower end of the bus bar cover 11B toward the front X1, and are provided continuously between adjacent insulation protection walls 13. The structure is such that each insulating protection wall 13 is reinforced.

Next, the procedure for assembling the fuse unit 1 will be explained with reference to FIGS. 7 to 11. 10 and 11, parts other than the terminal portions of the electric wires 15A and 16A constituting the power supply wire harness 15 and the external circuit wire harness 16 are omitted.

First, a single metal plate is pressed and bent to form a punched body including a first bus bar 3, a second bus bar 5, a third bus bar 7, and a fourth bus bar 9 that are continuous with each other. . After that, the connection bolt 34 is attached to the power supply connection part 32, and the connection bolt 73 is attached to each wire connection part 71, and in this state, the punched body and each covering part 4, 6, 8 are integrated by insert molding. A molded fuse unit 1 (shown in FIG. 7) having the following configuration is formed.

As shown in FIG. 7, in the molded fuse unit 1, each fourth bus bar 9 is located between the vertical component 2B of the unit body 2 and the lower unit 2C, and is exposed to the outside. . Further, as shown in FIG. 7, the molded fuse unit 1 is in a state in which the vertical component 2B of the unit main body 2 and the unit lower part 2C are lined up in the vertical direction Z (a state in which each fourth bus bar 9 is not bent). It becomes.

Next, the fourth bus bar 9 of the fuse unit 1 in the molded state is bent into a U-shape (180 degrees) so that the vertical component 2B of the unit main body 2 and the lower part 2C of the unit face each other (bending step). Along with this, the lock portion 82 of the lower unit portion 2C is brought closer to the lock protrusion 62 of the vertical component 2B, and the lock portion 82 and the lock protrusion 62 engage with each other (engaging step). As a result, the opening 6F at the front side X1 of each fuse accommodating portion 61 is collectively covered by the unit lower portion 2C, and the vertical component 2B of the unit main body 2 and the unit lower portion 2C are maintained in a facing state. According to this, the opening 6F of the front X1 of each fuse accommodating part 61 is covered all at once by the unit lower part 2C, so that the number of parts for covering the opening 6B of each fuse accommodating part 61 can be reduced.

Next, as shown in FIGS. 8 and 9, the L-shaped terminal 15C at the end of the power supply wire harness 15 is brought close to the power supply connection part 32, and the bolt shaft part 34 of the connection bolt 34 (designated by the same reference numeral as the connection bolt) is brought close to the power supply connection part 32. (provided), and screw the nut N onto the bolt shaft portion 34. Thereby, the power supply wire harness 15 is electrically and mechanically connected to the power supply connection section 32 .

In addition, as shown in FIGS. 8 and 9, the round terminal 16C at the terminal of the external circuit wire harness 16 is brought close to each wire connection part 71, and the bolt shaft part 73 of the connection bolt 73 (the same reference numeral as the connection bolt (provided), and screw the nut N onto the bolt shaft portion 73. Repeat this process 4 times. Thereby, the external circuit wire harness 16 is electrically and mechanically connected to each wire connection portion 71.

Further, as shown in FIG. 8, the cover main body 11 of the cover 10 is moved closer to the vertical component 2B. The locking portion 12 of the cover 10 approaches and locks the locking receiving portion of the vertical component 2B. The cover main body 11 collectively covers the openings 6B at the rear X2 of each fuse accommodating section 61, and two of the insulation protection walls 13A and 13B of the cover 10 (indicated by the reference numeral 13A) cover the four fourth They are positioned at both ends of the bus bar 9, and three (indicated by reference numeral 13B) enter between each adjacent fourth bus bar 9. In this way, the cover 10 is assembled to the vertical component 2B.

In this state, the opening 6F at the front X1 of each fuse accommodating portion 61 is covered by the third covering body 80, and the opening 6B at the rear X2 of each fuse accommodating portion 61 is covered by the fuse cover 11A of the cover body 11. According to this, since the opening 6F at the front X1 and the opening 6B at the rear X2 of each fuse accommodating part 61 are covered, foreign matter is prevented from entering into the inside of each fuse accommodating part 61. Moreover, even if the fuse element 55 constituting each fuse 51 is blown away, it is possible to prevent it from blown out to the outside of each fuse accommodating portion 61.

Finally, when connecting the battery connection part 31 to the battery 100, as shown in FIGS. 9 and 10, with the stud bolt 105 connected to one end of the battery terminal 104, The battery terminal 104 is attached to the battery connection part 31 by inserting a stud bolt 105 into the part 3a (shown in FIG. 9) and screwing a nut N with a washer onto the stud bolt 105. After that, as shown in FIG. 11, by attaching the battery terminal 104 to the battery post 103, the battery connection part 31 is electrically connected to the battery post 103, that is, the battery 100, via the battery terminal 104 and the stud bolt 105. be done. In this way, the opposing fuse units 1 are assembled (directly attached) to the battery 100. This completes the assembly of the fuse unit 1.

According to the embodiment described above, the fourth bus bar 9 (connecting portion) is provided continuously between the fuse 51 (melting portion) and the wire connecting portion 71 (second connecting portion), and The fourth bus bar 9 is formed by exposing a metal plate to the outside, and is bent so that the unit main body 2 (first unit) and the unit lower part 2C (second unit) face each other. That is, the fourth bus bar 9 is configured such that the metal plate is exposed to the outside, so that a configuration can be realized in which the fourth bus bar 9 is bent and the unit main body 2 and the unit lower portion 2C are opposed to each other. According to this, it is possible to reduce the size of the fuse unit 1 in the vertical direction Z. Thereby, a space can be secured below the fuse unit 1 Z2.

Further, the first housing 20 is provided with a lock projection 62 (first lock), and the third covering portion 8 (second housing) is provided with a lock portion 82 (second lock) that engages with the lock projection 62. , the lock protrusion 62 and the lock portion 82 are engaged with each other in a state where the unit main body 2 (first unit) and the unit lower part 2C (second unit) face each other. According to this, since the lock protrusion 62 and the lock part 82 are engaged with each other, it is possible to maintain the state in which the unit main body 2 and the unit lower part 2C face each other.

Further, the first housing 20 includes a cover 10 that is assembled to the first housing 20, a plurality of fuses 51 (melting portions) are provided, and a fourth bus bar 9 (connection portion) is connected to each of the plurality of fuses 51 and is spaced apart from each other. The cover 10 includes a cover body 11 that covers the plurality of fuses 51, and a cover 10 that extends from the cover body 11 and enters between adjacent fourth bus bars 9 to insulate the adjacent fourth bus bars 9 from each other. A plurality of insulation protection walls 13 are provided. According to this, when the cover 10 is assembled to the first housing 20, the plurality of fuses 51 are covered by the cover body 11, and the adjacent fourth bus bars 9 are insulated from each other by the insulation protection wall 13. That is, by providing the cover 10, it is possible to realize a configuration in which adjacent fourth bus bars 9 are insulated from each other.

In addition, with the unit main body 2 (first unit) and the lower unit 2C (second unit) facing each other, the fuse 51 (melting part) is opposite to the battery 100 with the wire connection part 71 (second connection part) in between. It is provided on the side (rear X2). According to this, the state of the fuse 51 can be checked while the fuse unit 1 is assembled to the battery 100.

Further, in the above-described embodiment, the fuse unit assembly method includes bending the unit body 2 (first unit) and the unit lower part 2C (second unit) at the fourth bus bar 9 (connection part) to form the unit body 2 vertically. The process includes a bending step in which the portion 2B and the lower unit portion 2C are made to face each other, and an engagement step in which the lock protrusion 62 (first lock) and the lock portion 82 (second lock) are engaged with each other. According to this, it is possible to reduce the size of the fuse unit 1 in the vertical direction Z.

In addition, the best configuration, method, etc. for carrying out the present invention have been disclosed in the above description, but the present invention is not limited thereto. That is, although the present invention has been specifically illustrated and described primarily with respect to particular embodiments, modifications may be made to the embodiments described above without departing from the spirit and scope of the invention. , materials, quantities, and other detailed configurations, those skilled in the art can make various modifications. Therefore, the descriptions that limit the shapes, materials, etc. disclosed above are provided as examples to facilitate understanding of the present invention, and do not limit the present invention. Descriptions of names of members that exclude some or all of the limitations such as these are included in the present invention.

1 Fuse unit 2 Unit body (first unit)
2C Lower unit (2nd unit)
20 First housing 8 Third covering part (second housing)
9 4th bus bar (connection part)
10 Cover 11 Cover body 13 Insulation protection wall 31 Battery connection part (first connection part)
51 Fuse (melting part)
62 Lock protrusion (first lock)
71 Wire connection part (second connection part)
82 Lock part (second lock)
100 battery

Claims (5)

A fuse unit supported by a battery and supplying power from the battery to a load, the fuse unit comprising:
A first unit connected to the battery, a second unit connected to the load, and a connecting portion connecting the first unit and the second unit,
The first unit includes a first housing, a first connection part connected to the battery, and a fusing part that melts when an overcurrent flows,
The second unit includes a second housing and a second connection portion connected to the load,
The connecting portion is provided continuously between the fusing portion and the second connecting portion, and has a metal plate exposed to the outside. A fuse unit characterized in that the first unit and the second unit are bent so as to face each other. The first housing is provided with a first lock,
The second housing is provided with a second lock that engages with the first lock,
The fuse unit according to claim 1, wherein the first lock and the second lock are engaged with each other in a state where the first unit and the second unit face each other. a cover supported by the first housing;
A plurality of the fusing parts are provided,
The connecting portion is continuous with each of the plurality of fusing portions and is provided in plurality spaced apart from each other,
The cover includes a cover main body that covers the plurality of fusing parts, and a plurality of insulating protection walls that extend from the cover main body, enter between the adjacent connecting parts, and insulate the adjacent connecting parts from each other. The fuse unit according to claim 2, comprising: With the first unit and the second unit facing each other,
3. The fuse unit according to claim 1, wherein the fusing part is provided on a side opposite to the battery with the second connection part in between. A method for assembling a fuse unit using the fuse unit according to claim 2 or 3,
a bending step of bending the first unit and the second unit at the connecting portion to face the first unit and the second unit;
A method for assembling a fuse unit, comprising the step of engaging the first lock and the second lock with each other.

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